Home / 20,907.85-31,360.55-15,291.21

Finding the Fourth Proportional to 20,907.85, 31,360.55 and 15,291.21

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Solution

The fourth proportional to 20,907.85, 31,360.55 and 15,291.21 is: 22,935.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,907.85 : 31,360.55 = 15,291.21 : x
  2. Step 2: Convert to fraction form
    20,907.85/31,360.55 = 15,291.21/x
  3. Step 3: Cross multiply
    20,907.85x = 31,360.55 × 15,291.21
  4. Step 4: Simplify right side
    20,907.85x = 479,540,755.77
  5. Step 5: Solve for x
    x = 479,540,755.77/20,907.85
  6. Step 6: Final answer
    x = 22,935.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.